Claims that aliens are already here are everywhere, but proving them is another matter. The strongest cases become more ...

Some of the most intriguing clues may already be sitting in scientific data. The difficult part is knowing when an unusual ...

If alien life exists, its absence from our instruments may have several very different explanations. The longer the silence continues, the more interesting the mystery becomes.

Some UFO cases remain difficult to explain, but that is only the beginning of the scientific question. The evidence needed to ...

A new study proposes searching the moon for remnants of ancient extraterrestrial technology. Researchers suggest the moon's surface could preserve microscopic "technosignatures" left by alien ...

Space is a dangerous place – but for the astronauts who venture beyond Earth’s atmosphere, ingenuity and luck have helped ...

There might be alien life on a nearby moon, scientists say - Saturn’s companion Enceladus has long been a particularly promising place to find aliens – and now researchers say that extraterrestrial li ...

Researchers are particularly interested in planets orbiting orange K-dwarf stars, which could support life for billions of ...

Scientists have developed a compact electric detector that will help search for signs of extraterrestrial life based on the ...

Scientists believe there are planets outside our solar system where life is even more abundant and sustainable.